If Marlon Brando and James Dean defined the defiant American male as a sullen rebel, Paul Newman recreated him as a likable renegade, a strikingly handsome figure of animal high spirits and blue-eyed candor whose magnetism was almost impossible to resist, whether the character was Hud, Cool Hand Luke or Butch Cassidy.

He acted in more than 65 movies over more than 50 years, drawing on a physical grace, unassuming intelligence and good humor that made it all seem effortless.

Yet he was also an ambitious, intellectual actor and a passionate student of his craft, and he achieved what most of his peers find impossible: remaining a major star into a craggy, charismatic old age even as he redefined himself as more than Hollywood star. He raced cars, opened summer camps for ailing children and became a nonprofit entrepreneur with a line of foods that put his picture on supermarket shelves around the world.

Paul Leonard Newman was born on Jan. 26, 1925, in Cleveland. His mother, the former Teresa Fetzer, was a Roman Catholic who turned to Christian Science. His father, Arthur, who was Jewish, owned a thriving sporting goods store that enabled the family to settle in affluent Shaker Heights, Ohio, where Paul and his older brother, Arthur, grew up.

In May 1950 his father died, and Mr. Newman returned to Cleveland to run the sporting goods store. He brought with him a wife, Jacqueline Witte, an actress he had met in summer stock. But after 18 months Paul asked his brother to take over the business while he, his wife and their year-old son, Scott, headed for Yale University, where Mr. Newman intended to concentrate on directing.

He left Yale in the summer of 1952, perhaps because the money had run out and his wife was pregnant again. But almost immediately, the director Josh Logan and the playwright William Inge gave him a small role in “Picnic,” a play that was to run 14 months on Broadway. Soon he was playing the second male lead and understudying Ralph Meeker as the sexy drifter who roils the women in a Kansas town.

Then Hollywood knocked. In 1954 Warner Brothers offered Mr. Newman $1,000 a week to star in “The Silver Chalice” as the Greek slave who creates the silver cup used at the Last Supper. Mr. Newman, who rarely watched his own films, once gave out pots, wooden spoons and whistles to a roomful of guests and forced them to sit through “The Silver Chalice,” which he called the worst movie ever made.

His antidote for that early Hollywood experience was to hurry back to Broadway. In Joseph Hayes’s play “The Desperate Hours,” he starred as an escaped convict who holds a family hostage. The play was a hit, and during its run, Jacqueline Newman gave birth to their third child.

Mr. Newman returned to Broadway for the last time in 2002, as the Stage Manager in a lucrative revival of Thornton Wilder’s “Our Town.” The performance was nominated for a Tony Award, though critics tended to find it modest. When the play was broadcast on PBS in 2003, he won an Emmy.

This year he had planned to direct “Of Mice and Men,” based on the John Steinbeck novel, in October at the Westport Country Playhouse in Connecticut. But in May he announced that he was stepping aside, citing his health.